/*
 * SPDX-License-Identifier: Apache-2.0
 *
 * The OpenSearch Contributors require contributions made to
 * this file be licensed under the Apache-2.0 license or a
 * compatible open source license.
 */

/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch licenses this file to you under
 * the Apache License, Version 2.0 (the "License"); you may
 * not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

/*
 * Modifications Copyright OpenSearch Contributors. See
 * GitHub history for details.
 */

package org.opensearch.painless.node;

import org.opensearch.painless.Location;
import org.opensearch.painless.phase.UserTreeVisitor;

import java.util.Objects;

/**
 * Represents a regex constant. All regexes are constants.
 */
public class ERegex extends AExpression {

    private final String pattern;
    private final String flags;

    public ERegex(int identifier, Location location, String pattern, String flags) {
        super(identifier, location);

        this.pattern = Objects.requireNonNull(pattern);
        this.flags = Objects.requireNonNull(flags);
    }

    public String getPattern() {
        return pattern;
    }

    public String getFlags() {
        return flags;
    }

    @Override
    public <Scope> void visit(UserTreeVisitor<Scope> userTreeVisitor, Scope scope) {
        userTreeVisitor.visitRegex(this, scope);
    }

    @Override
    public <Scope> void visitChildren(UserTreeVisitor<Scope> userTreeVisitor, Scope scope) {
        // terminal node; no children
    }
}
